Oracle给字段加注释

 create table "HNASIS_TEST"."TA_FLIGHT_V2"(
        "FLT_ALCDTW" VARCHAR2(5) not null,
       "FLT_NUMBER" VARCHAR2(5) not null,
       "FLT_SUFFIX" VARCHAR2(5),
       "FLT_DATE" DATE not null,
       "FLT_CODESHARED" VARCHAR2(100),
       "FLT_PORTS" VARCHAR2(50)
    );
    comment on table "HNASIS_TEST"."TA_FLIGHT_V2" is '系统的航班基本信息表';
    comment on column "HNASIS_TEST"."TA_FLIGHT_V2"."FLT_ALCDTW" is '航空公司两字代码';